<template>
	<view>
		<my-search @click="gotoSearch()"></my-search>
		<view>
			<view class="scroll-view-container">
				<!-- 左侧滑动区域 -->
				<scroll-view scroll-y="true" style="height:300px" class="scroll-left" :style="{height:wh + 'px'}">
					<block v-for="(item,i) in cateList" :key="i">
						<view :class="['left-scroll-item',i===active?'active':'']" @click="activeChange(i)">
							{{item.cat_name}}
						</view>
					</block>
				</scroll-view>
				<!-- 右侧滑动 -->
				<scroll-view scroll-y="true" style="height: 300px;" class="scroll-right" :style="{height:wh + 'px'}" :scroll-top="scrollTop">
					<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
						<!-- 分类二级标题 -->
						<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
						<view class="cate-lv3-list">
							<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodList(item3)">
								<image :src="item3.cat_icon"></image>
								<text>{{item3.cat_name}}</text>
							</view>
						</view>
					</view>
				</scroll-view>
			</view>
		</view>
	</view>
	
</template>

<script>
	import tarbar_badge from '../../mixins/tarbar_badge';
	export default {
		mixins:[tarbar_badge],
		data() {
			return {
				/* 当前页面的可用高度 */
				wh:0,
				cateList:[],
				active:0,
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad() {
			const sysInfo=uni.getSystemInfoSync()
			this.wh=sysInfo.windowHeight
			this.getCateList()
		},
			
		methods:{
			async getCateList(){
				const {data:res}=await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status!==200)return uni.$showMsg()
				this.cateList=res.message
				this.cateLevel2=res.message[0].children
			},
			activeChange(i){
				this.active=i
				this.cateLevel2=this.cateList[i].children
				this.scrollTop=this.scrollTop?0:1
			},
			gotoGoodList(item){
				uni.navigateTo({
					url:'/subpkg/good_list/good_list?cid='+item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	background-color: #ffffff;
	display: flex;
	.scroll-left{
		width: 120px;
	}
}
.left-scroll-item{
	background-color: #f7f7f7;
	line-height: 60px;
	text-align: center;
	font-size: 12px;
	&.active{
		background-color: #ffffff;
		position: relative;
		&::before{
			content: ' ';
			display: block;
			width: 3px;
			height: 30px;
			background-color: red;
			position: absolute;
			top:50%;
			left:0;
			transform: translateY(-50%);
		}
	}
}
.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
			margin-bottom: 10px;
		}
	}
}
</style>
